Adding 90° to an angle 5. Angles 0 and (0 + 90°) are shown. P(a,b) a. Explain why the coordinates of point S are (-b, a). Hint: Draw segments downward from S and from P to create two right triangles. What can you prove about those triangles? e+90 b. Find all the relationships you can between the trigonometric functions of 0 and the trigonometric functions of (0 + 90°). There's something to find for each of the six functions.

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